Hi Deriv Community! 
Thank you for clicking on this post and we’re truly sorry if there are any unauthorized trades ever happened to you. Be assured, that our customer support team is here to help check the trades that were placed on your account without your knowledge. In order to do so, you would need to provide us with the following details for our perusal via LiveChat.
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Account number
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Trade IDs that were affected
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Date and time of the trades
You may find this information in the statement section of your account.
Once the above information is provided, you may contact our customer support team via LiveChat to inform our agents. Our team will further check this matter for you and provide you with an update in 1 to 3 working days via email.
Aside from that, to enhance the security of your account, you may refer to this post to secure your account by clicking here as well as on our website.
If you have any questions, please visit our Help Centre or contact us via Live Chat and WhatsApp.